Flavio Chierichetti Ravi Kumar 0001 LSH-preserving functions and their applications. 1078-1094 2012 SODA https://doi.org/10.1137/1.9781611973099.85 https://dl.acm.org/citation.cfm?id=2095201 conf/soda/2012 db/conf/soda/soda2012.html#ChierichettiK12a